Anti-pinch door and buffer device thereof

Abstract

The present invention relates to a door, and in particular to an anti-pinch door and a buffer device thereof. The door comprises a door frame, a door leaf and a handle, wherein the door leaf is hinged in the door frame through a driving shaft, and the handle is installed on the door leaf. The door also comprises a sleeve, a wire rope, a positioning body, a nut, a screw rod and a motor, wherein the wire rope is wound on the sleeve, and the sleeve is sleeved on the driving shaft, and the wire rope is connected to the positioning body, and the positioning body is fixed on the nut, and the nut is threadedly connected to the screw rod, and the screw rod is connected to the motor; the motor drives the screw rod to rotate forward and reversely, and drives the nut and the positioning body to move back and forth, and the positioning body drives the sleeve to rotate forward and reversely through the wire rope to realize opening and closing the door; the human infrared sensor is installed on the front, back and side of the door leaf, and the human infrared sensor, the motor and the controller are electrically connected. The present invention prevents the elderly, children and disabled people from being pinched when entering and closing the door, and improves the safety during use.

Description

Technical Field

[0001] The invention relates to a door, and in particular to an anti-pinch door and a buffer device thereof. Background Art

[0002] With the continuous development of social economy, the improvement of living standards and the continuous improvement of living conditions, people have begun to have higher and higher requirements for the safety performance of doors entering and exiting crowded places such as homes and public buildings.

[0003] Glass automatic sensing doors and revolving doors generally have built-in anti-pinch functions. The doors in crowded places such as homes and public buildings are mostly swing doors with door leaves hinged on the door frames. Swing doors usually do not have anti-pinch functions, and there are no anti-pinch devices for swing doors specifically suitable for the lives of the elderly.

[0004] Aging has become a major problem in today's society. The elderly have relatively slow reactions and are less mobile. In crowded places such as homes and public buildings, it is inconvenient for them to open and close swing doors when entering and exiting, and there is a high probability that they will be pinched. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an anti-pinch door and a buffer device thereof to prevent the elderly, children and disabled persons from being pinched when entering or exiting the swing door, thereby improving safety during use.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The invention discloses an anti-pinch door and a buffer device thereof, comprising a door frame, a door leaf and a handle. The door leaf is hinged in the door frame through a driving shaft, and the handle is installed on the door leaf. The invention also comprises a sleeve, a wire rope, a positioning body, a nut, a screw rod and a motor. The wire rope is wound on the sleeve, and the sleeve is sleeved on the driving shaft. The wire rope is connected to the positioning body, and the positioning body is fixed on the nut. The nut is threadedly connected to the screw rod, and the screw rod is connected to the motor. The motor drives the screw rod to rotate forward and reverse, drives the nut and the positioning body to move back and forth, and the positioning body drives the sleeve to rotate forward and reverse through the wire rope to realize opening and closing of the door. The human infrared sensor is installed on the front, back and side of the door leaf, and the human infrared sensor, the motor and the controller are electrically connected.

[0008] It also includes a limiting component, which includes a limiting roller, a limiting ring and a fixed column; two limiting rollers are installed in the limiting ring, the wire rope passes between the two limiting rollers, and the fixed column is fixedly connected to both ends of the limiting ring.

[0009] The door frame consists of a top beam, a bottom frame and two upright columns fixed between the top beam and the bottom frame.

[0010] An installation groove is arranged in the top beam, and a sleeve, a steel wire rope, a positioning body, a nut, a screw rod and a motor are installed in the installation groove.

[0011] A plurality of heat dissipation holes are arranged on the front and rear sides of the top beam, and the heat dissipation holes are communicated with the mounting grooves.

[0012] The controller adopts the single-chip microcomputer AT89C51, and the motor adopts a stepper motor. The human infrared sensor detects whether the human body is at the edge of the door leaf, converts it into an electrical signal, triggers the single-chip microcomputer, and then the single-chip microcomputer drives the stepper motor through ULN2003 to realize the opening and closing of the door through the forward and reverse rotation of the motor.

[0013] The human body infrared sensor adopts a pyroelectric infrared sensor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) The human infrared sensor of the present invention is installed on the door leaf and is located at the handle. When the human infrared sensor detects that a human hand is approaching the edge of the door leaf, a pulse signal is transmitted to the controller. After judgment, the controller controls the motor to run. The motor drives the screw rod to rotate, drives the nut and the positioning body to move, and the positioning body drives the sleeve to rotate through the wire rope, drives the door leaf to rotate counterclockwise, and then can pull the door leaf to open, so as to avoid pinching of the elderly, children and disabled people when entering and exiting the swing door, thereby improving safety during use.

[0016] 2) The present invention is provided with a limiting assembly, and the wire rope passes through two limiting rollers, which reduces the friction of the wire rope during movement, improves the smoothness of the movement of the wire rope, and limits the movement trajectory of the wire rope at the same time.

[0017] 3) The top beam of the present invention is provided with a plurality of heat dissipation holes on both the front and rear sides, and the heat dissipation holes are connected with the mounting grooves, so that the heat dissipation effect is good and the service life of the device is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is an exploded schematic diagram of the three-dimensional structure of the door frame of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the motor and the transmission part of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the sleeve, steel wire rope, positioning body and limiting assembly of the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional installation of the human infrared sensor of the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the limiting component of the present invention;

[0024] Figure 7 It is the electrical principle block diagram of the present invention;

[0025] Figure 8 It is the electrical schematic diagram of the present invention.

[0026] In the figure: 1-door frame 2-door leaf 3-handle 4-sleeve 5-wire rope 6-positioning body 7-screw nut 8-screw rod 9-limiting assembly 10-motor 11-top beam 12-bottom frame 13-column 21-drive shaft 22-installation hole 111-installation groove 112-heat dissipation hole 91-limiting roller 92-limiting ring 93-fixing column 010-human infrared sensor 011-transparent plastic plate DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0028] like Figure 1-8 As shown, an anti-pinch door and its buffer device include a door frame 1, a door leaf 2 and a handle 3. The door leaf 2 is hinged in the door frame 1 through a drive shaft 21 and a bearing, and the handle 3 is installed in the front and rear of the door leaf 2.

[0029] It also includes a sleeve 4, a steel wire 5, a positioning body 6, a nut 7, a screw 8, a motor 10, a limit assembly 9 and a human infrared sensor 010. The steel wire 5 is wound on the sleeve 4, the sleeve 4 is sleeved on the drive shaft 21, the steel wire 5 is connected to the positioning body 6, the positioning body 6 is fixed on the nut 7, the nut 7 is threadedly connected to the screw 8, and the screw 8 is connected to the motor 10. The motor 10 drives the screw 8 to rotate forward and reverse, drives the nut 7 and the positioning body 6 to move back and forth, and the positioning body 6 drives the sleeve 4 and the drive shaft 21 to rotate forward and reverse through the steel wire 5, and drives the door leaf 2 to rotate counterclockwise or clockwise to achieve opening and closing the door.

[0030] The door frame 1 is composed of a top beam 11, a bottom frame 12 and two columns 13 fixed between the top beam 11 and the bottom frame 12. A mounting groove 111 is provided in the top beam 11, and the sleeve 4, the wire rope 5, the positioning body 6, the nut 7, the screw rod 8 and the motor 10 are installed in the mounting groove 111.

[0031] A plurality of heat dissipation holes 112 are provided on the front and rear sides of the top beam 11, and the heat dissipation holes 112 are connected to the mounting grooves 111. The heat dissipation effect is good, and the service life of the device is prolonged.

[0032] The limiting assembly 9 includes a limiting roller 91, a limiting ring 92 and a fixing column 93; the two limiting rollers 91 are horizontally installed in the limiting ring 92, the wire rope passes between the two limiting rollers 91, the fixing column 93 is fixed to the two ends of the outer wall of the limiting ring 92, and the fixing column 93 is fixed to the door frame 1. The wire rope 5 passes between the two limiting rollers 91, which reduces the friction of the wire rope 5 during the movement, improves the smoothness of the movement of the wire rope 5, and limits the movement trajectory of the wire rope 5.

[0033] The front, rear and side of the door leaf 2 are provided with mounting holes 22 at the handle 3 , the human infrared sensor 010 is placed in the mounting hole 22 , and the transparent plastic plate 011 is fixed to the opening of the mounting hole 22 .

[0034] like Figure 7 , Figure 8 As shown, the controller of the present invention adopts a single-chip microcomputer AT89C51, the motor 10 adopts a 28BYJ48 stepper motor, and the human infrared sensor 010 adopts a pyroelectric infrared sensor. The control system is mainly composed of a power module, a sensor, a signal processing unit, a BISS0001 chip, an MCU unit, and a ULN2003 chip; the signal detection and processing part is composed of a pyroelectric infrared sensor, a signal processing unit, and a BISS0001 chip; the function of the sensor is to sense whether there is a person, so a pyroelectric infrared sensor is used, which is only sensitive to infrared radiation with a wavelength of about 10um (the wavelength of infrared radiation from the human body), and will not cause the probe to move for other objects except the human body; the MCU part adopts the 89C51 single-chip microcomputer produced by ATMEL, which has the advantages of low price, simple development, convenient operation, and encryption, so it has a very large market share. The function of the single-chip microcomputer is to process the signal sent by BISS0001 and give it to the ULN2003 chip, and the ULN2003 chip drives the stepper motor.

[0035] The pyroelectric infrared sensor is used to detect whether the human body is at the edge of the door leaf, and the pulse signal is transmitted to the microcontroller. After the microcontroller makes a judgment, the ULN2003 is used to drive the stepper motor to move, and the door is opened and closed by the forward and reverse rotation of the stepper motor.

[0036] The working principle and working process of the present invention are as follows: pedestrians are monitored by the human infrared sensor 010. When the human infrared sensor 010 detects that a human hand is close to the edge of the door leaf 2, a pulse signal is transmitted to the controller. After the controller makes a judgment, it controls the motor 10 to run, driving the screw rod 8 to rotate, and the screw rod 8 drives the nut 7 to drive the positioning body 6 to move. The positioning body 6 drives the sleeve 4 to rotate through the wire rope 5. Because the wire rope 5 is located at the front side of the sleeve 4, the wire rope 5 will drive the sleeve 4 to drive the drive shaft 21 to rotate counterclockwise during the movement with the positioning body 6, driving the door leaf 2 to move counterclockwise, and then opening the door leaf 2. On the contrary, after the human infrared sensor 010 cannot detect the human body, a pulse signal is transmitted to the controller. After the controller makes a judgment, it controls the motor 10 to run in the reverse direction, driving the screw rod 8 to rotate in the reverse direction, and the nut 7 drives the positioning body 6 to move backward. The positioning body 6 drives the sleeve 4 to rotate through the wire rope 5, and the wire rope 5 is wound up, and the door can be closed.

[0037] The present invention prevents the elderly, children and disabled persons from being pinched when entering or exiting the swing door, thereby improving safety during use.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-pinch door buffer device, comprising a door frame, a door leaf and a handle, wherein the door leaf is hinged in the door frame through a drive shaft, and the handle is installed on the door leaf, characterized in that: It also includes a sleeve, a wire rope, a positioning body, a nut, a screw rod, a motor and a human infrared sensor. The wire rope is wound on the sleeve, the sleeve is sleeved on the driving shaft, the wire rope is connected to the positioning body, the positioning body is fixed to the nut, the nut is threadedly connected to the screw rod, and the screw rod is connected to the motor; the motor drives the screw rod to rotate forward and reverse, drives the nut and the positioning body to move back and forth, and the positioning body drives the sleeve to rotate forward and reverse through the wire rope to realize opening and closing the door; the human infrared sensor is installed on the front, back and side of the door leaf, and the human infrared sensor, the motor and the controller are electrically connected; The front, back and side of the door leaf are provided with mounting holes at the handles, the human infrared sensor is placed in the mounting holes, and the transparent plastic plate is fixed to the opening of the mounting hole; The controller adopts AT89C51 single-chip microcomputer and stepper motor. The infrared sensor detects whether the human body is at the edge of the door leaf, converts it into an electrical signal, triggers the single-chip microcomputer, and then drives the stepper motor through ULN2003. The door is opened and closed by the forward and reverse rotation of the motor. The human body infrared sensor adopts a pyroelectric infrared sensor; It also includes a limiting component, which includes a limiting roller, a limiting ring and a fixed column; two limiting rollers are installed in the limiting ring, the wire rope passes between the two limiting rollers, and the fixed column is fixedly connected to both ends of the limiting ring.

2. The anti-pinch door buffer device according to claim 1, characterized in that: The door frame consists of a top beam, a bottom frame and two upright columns fixed between the top beam and the bottom frame.

3. The anti-pinch door buffer device according to claim 2, characterized in that: An installation groove is arranged in the top beam, and a sleeve, a steel wire rope, a positioning body, a nut, a screw rod and a motor are installed in the installation groove.

4. The anti-pinch door buffer device according to claim 3, characterized in that: A plurality of heat dissipation holes are arranged on the front and rear sides of the top beam, and the heat dissipation holes are communicated with the mounting grooves.

Images